JP2023121662A - packaging box - Google Patents

Abstract

To provide a packaging box that can prevent unintentional product spillage while providing the advantages of conventional packaging boxes.SOLUTION: A packaging box 1 is rectangular in shape and is a so-called wrap-around case type. A lower outer flap 32, which contacts an inner flap 33 from the outside, is not fixed to the inner flap 33, and an upper outer flap 31, which contacts the lower outer flap 32 from the outside, is glued to the lower outer flap 32. A top panel 4 includes: a door fold line d; a door breakable line 41 connecting both ends of the door fold line d; and an open breakable line 44 extending from the end of the door breakable line 41 to the corner of the adjacent top panel 4.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a packaging box in which a portion of the box is broken when opened.

2. Description of the Related Art Conventionally, a rectangular parallelepiped wraparound case type packaging box capable of accommodating a plurality of products is known (see Patent Document 1).

The packaging box is integrally formed with a front plate, a rear plate, a top plate, a bottom plate, and the like. In addition, the packaging box has a pair of first inner flaps that are connected to the left and right ends of the front plate so as to be bent inward, respectively, and a pair of first inner flaps that are connected to the left and right ends of the rear plate so as to be bent inward. and a pair of second inner flaps.

In addition, the packaging box is continuously arranged so as to be bent inward from the left and right ends of the bottom plate, and is arranged outside the pair of first inner flaps and the pair of second inner flaps. A pair of first outer flaps that are not fixed to the flaps, and a pair of second outer flaps that are connected to the left and right ends of the top plate so as to be bent inward, respectively, and are fixed in a state of being in contact with the pair of first outer flaps from the outside. 2 outer flaps;

The first inner flap has an arc-shaped cutout at the front corner, and the top plate is formed with a breakable line for breaking the top plate when the packaging box is opened. The breakable line connects both corners of the top plate on the front plate side and protrudes toward the rear plate side.

As a result, when the packaging box is opened, a worker breaks a part of the top plate along the breakable line and pulls it to the front side, thereby separating the top plate, the front plate and the pair of second plates. 1 inner flap can be integrally rotated to the front, and both the top plate and the front plate of the packaging box can be opened at once.

Therefore, for example, by tilting the front surface of the unsealed packaging box downward, the stored products can be collectively transferred to a product shelf, a freezer, or the like.

Utility Model Registration No. 3235742

However, in particular, when the stored product does not stand on its own, and when it is desired to take out a part of the product from the opened packaging box or to use the opened packaging box as a tray, the above-mentioned conventional packaging box does not allow the product to stand on its own. There is a problem that it spills out of the packaging box without being done.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a packaging box that has the advantages of conventional packaging boxes and that can prevent products from unintentionally spilling out.

In order to achieve such an object, a first packaging box of the present invention is a packaging box having a rectangular tubular body and a closing part for closing an open end of the body, wherein the body is , a top plate, a bottom plate facing the top plate, and a side plate connecting the top plate and the bottom plate are respectively connected via a trunk fold line, and the top plate and the bottom plate have , outer flaps are continuously provided on both ends of the open end side of the body through fold lines of the outer flaps, and the side plates have inner flaps on both ends of the open end of the body through fold lines of the inner flaps. The closed part is the inner flap bent inward at the inner flap crease line and one outer flap continuous with the top plate and the bottom plate, wherein the outer flap crease line An outer flap unfixed to the inner flap in a state of being folded inward and in contact with the inner flap from the outside, and an outer flap connected to the other of the top plate and the bottom plate, wherein the outer flap is folded and an outer flap fixed to the unfixed outer flap in a state in which it is bent inward at the line of sight and contacts the unfixed outer flap from the outside, and the top plate is provided along the fold line of the outer flap. An extending door fold line, a door breakable line connecting both ends of the door fold line and extending convexly in a direction away from the outer flap fold line, and an end of the door breakable line to an end of the door breakable line. and a breakable open line extending to the edge of the outer flap adjacent to the corner of the top plate adjacent to the door breakable line or the edge of the door breakable line.

In the first packaging box of the present invention, the top plate has a door crease line extending along the outer flap crease line, and both ends of the door crease line are connected to each other, and the door can be broken so as to extend convexly in a direction away from the outer flap crease line. Lines and are provided. Therefore, the operator breaks the top plate along the door breakable line, and places the area surrounded by the door breakable line and the door fold line (hereinafter simply referred to as "door part") outside the packaging box. A portion of the top plate can be opened by pulling it to gradually break the door breakable line, and by rotating and folding it along the door crease line.

Therefore, according to the first packaging box of the present invention, only the top plate can be opened in a state in which the four sides of the packaging box are surrounded by the pair of side plates and the pair of closing portions, so that the product can be unintentionally closed. can be prevented from spilling out.

Further, in the first packaging box of the present invention, the corner of the top plate adjacent to the end of the door breakable line from the end of the door breakable line or the end of the door breakable line A breakable line is provided that extends to the edge of the outer flap. Therefore, by pulling the door part, the ceiling can be pulled along the possible breakable line to the corner of the top plate adjacent to the end of the possible breaking line of the door or to the edge of the outer flap adjacent to the end of the possible breaking line of the door. The plate is broken.

At that time, the broken and separated top plate is connected to the outer flap on the top plate side through the fold line of the outer flap, and the outer flap on the top plate side is fixed to the outer flap on the bottom plate side. Since the flaps are not fixed to the inner flaps, the separated top plate and both outer flaps can rotate integrally along the fold line of the outer flaps on the bottom plate side. Then, the inner flap from which the outer flap that was in contact with the outer side has been removed can be folded back along the inner flap folding line.

Therefore, according to the first packaging box of the present invention, not only the top plate but also the closing portion can be opened.

In the first packaging box of the present invention, the top plate has a door crease line, the door breakable line, and the open breakable line at each of both ends on the open end side of the body, and both doors are broken. Preferably, the lines of possibility are at least partially tangent.

According to the packaging box having this configuration, the top plate can be opened widely by opening the doors on both sides, making it easy to take out the product.

Moreover, both closure parts can be unsealed by breaking a top plate along both open breakable lines. Moreover, since the both-door breakable line is partially in contact, the top plate is divided by the double-door breakable line. That is, the side plates are not connected by the top plate left uncut, so that they can be rotated along the trunk fold line on the side of the bottom plate.

Therefore, according to the packaging box having this configuration, the packaging box can be fully unfolded and the number of discarded items can be reduced to "1". In addition, since the fully unfolded packaging box returns to a flat plate shape, it is possible to reduce the bulkiness of the discarded items.

In the first packaging box of the present invention, the possible door breakable line includes a first possible door breakable line connecting the side ends of the top plate, and a line extending from both ends of the first possible door breakable line to the side end of the top plate. and a pair of second door breakable lines extending along.

According to the packaging box having this configuration, the top plate can be opened widely, making it easy to take out the product. In addition, since the second door breakable line and the body crease line match, when making a packaging box from a flat plate, when making a square cylinder body by folding along the body crease line, the top plate is accidentally broken. It is possible to prevent bending at the door break line.

In the first packaging box of the present invention, it is preferable that the door crease line is formed along the outer flap crease line at an intermediate portion in the length direction of the outer flap crease line.

According to the packaging box having this configuration, there is no need to separately provide the door crease line on the top plate. In addition, in order to use the crease lines of the outer flaps, which are creased during box making before opening, as door crease lines, the door section (door breakage) can be easily performed simply by breaking the top plate along the line where both doors can be broken. The area bounded by the possibility line and the door crease line) can be opened.

Further, when the door is opened and only the top plate is unsealed, the unbroken top plate remains in the direction from the door crease line toward both ends of the outer flap crease line. Therefore, when stacking the packaging boxes with the doors opened, the unbroken top plate serves as a crosspiece, so that the packaging boxes can be easily stacked.

A second packaging box of the present invention is a packaging box having a square tube-shaped body and a closing part that closes an open end of the body, wherein the body includes a top plate, and the top plate A bottom plate facing each other and a side plate connecting the top plate and the bottom plate are connected to each other via a trunk fold line. Outer flaps are continuously provided at both ends on the end side via outer flap crease lines, and the outer flaps have insertion pieces at their tips via insertion crease lines. Inner flaps are continuously provided at both ends on the open end side via inner flap crease lines, and the closing portion is the inner flap bent inward at the inner flap crease lines and the outer flap, an outer flap that is bent inward at the outer flap fold line and is not fixed to the inner flap in a state of being in contact with the inner flap from the outside; The top plate includes a door crease line extending along the outer flap crease line and a door crease line connecting both ends of the door crease line to the outer flap. A door breakable line convexly extending in a direction away from the fold line, and a corner of the top plate adjacent to the end of the door breakable line from the end of the door breakable line or the end of the door breakable line and an open breakable line extending to the edge of the outer flap adjacent to the portion.

In the second packaging box of the present invention, the procedure and actions/effects for opening the top plate are the same as those of the first packaging box.

On the other hand, in the case where the outer flap is connected to the top plate, when the top plate is broken by pulling the door, the insertion piece at the tip of the outer flap connected to the outer flap is pulled out from the gap between the bottom plate and the inner flap. The removed top plate and the outer flap are removed integrally. Then, the inner flap from which the outer flap that was in contact with the outer side has been removed can be folded back along the inner flap folding line.

Similarly, when the outer flap is connected to the bottom plate, when the broken top plate is removed, the insertion piece at the tip of the outer flap is released from the state sandwiched between the top plate and the inner flap. Therefore, the outer flap can be folded back along the outer flap folding line, and the inner flap can be folded back along the inner flap folding line, so that the closed portion can be opened according to the second packaging box.

Therefore, according to the second packaging box, not only the top plate but also the closed portion can be opened.

A third packaging box of the present invention is a packaging box having a square tube-shaped body and a closing part that closes an open end of the body, wherein the body includes a top plate, and the top plate A bottom plate facing each other and a side plate connecting the top plate and the bottom plate are connected to each other via a trunk fold line, and the top plate and the bottom plate are connected to the open end side of the trunk. An outer flap is connected to the end of the outer flap through the fold line of the outer flap, and the side plate has an inner flap connected to the end of the open end side of the body through the fold line of the inner flap. The part is the inner flap bent inward at the inner flap crease line, and one outer flap connected to the top plate and the bottom plate, the outer flap being bent inward at the outer flap crease line. an outer flap that is not fixed to the inner flap while being in contact with the inner flap from the outside; a door fold line extending along the outer flap fold line on the top plate; A door breakable line connecting both ends of the door fold line and extending convexly in a direction away from the outer flap fold line is provided, and the top plate or the side plate is provided from the end of the door breakable line. and a breakable open line extending to a region sandwiched between the outer flap and the inner flap at the open end side end of the body of the top plate and the side plate.

In the first packaging box and the second packaging box described above, the open breakable line is the corner of the top plate adjacent to the end of the door breakable line from the end of the door breakable line or the door breakage line. Although it has been described that it extends to the edge of the outer flap adjacent to the end of the possible line, the possible open breakable line is the end of the open end side of the body of the top plate and side plate like the third packaging box and extend to a region sandwiched between the outer flap and the inner flap.

In short, by pulling the door portion, the top plate is broken along the open breakable line to a position where the outer flap is not provided at the end of the top plate, or at the end of the side plate and the inner flap If the top plate and the side plates are broken along the open breakable line to a position where the is not provided, the removed top plate and both outer flaps can be integrally rotated along the outer flap crease line on the bottom plate side.

Therefore, according to the third packaging box of the present invention, not only the top plate but also the closing portion can be opened.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the external appearance of the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the structure before the assembly of the packaging box which concerns on 1st Embodiment. It is a perspective view which shows the packaging box which concerns on 1st Embodiment when opening a top plate. It is a perspective view which shows the packaging box which concerns on 1st Embodiment when opening a closure part. It is a top view which shows the packaging box which concerns on 1st Embodiment after expansion|deployment. It is a perspective view which shows the external appearance of the packaging box which concerns on 2nd Embodiment of this invention. It is a top view which shows the structure before the assembly of the packaging box which concerns on 2nd Embodiment. It is a perspective view which shows the packaging box which concerns on 2nd Embodiment when opening a top plate. It is a perspective view which shows the packaging box which concerns on 2nd Embodiment when opening a closure part. It is a top view which shows the packaging box which concerns on 2nd Embodiment after expansion|deployment. It is a top view which shows the structure before assembly of the packaging box which concerns on 3rd Embodiment and 4th Embodiment of this invention.

[First embodiment]
A packaging box 1 according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. As shown in FIG. 1, the packaging box 1 of the first embodiment is a wrap-around case type having a rectangular parallelepiped appearance. In the packaging box 1, for example, a product such as an ice bar that easily collapses when stacked is stored inside, and a part of the box is broken when the package is opened.

The packaging box 1 has a rectangular tubular body 2 and a closing part 3 that closes the open end of the body 2 . The trunk portion 2 includes a top plate 4, a bottom plate 5, and side plates 6,6. The top plate 4, the bottom plate 5, and the side plates 6, 6 are all formed in a substantially rectangular shape.

The top plate 4 has a pair of door portions 7 that rotate toward the closing portion 3 when the package is opened. The door portion 7 is formed with a breaking start portion 8 into which a finger is inserted when the package is opened.

The packaging box 1 is assembled by punching out a substantially rectangular corrugated board 1x shown in FIG. 2 from a base paper and then folding it. Hereinafter, the configuration of the corrugated board 1x will be described with reference to FIG.

As shown in FIG. 2, the corrugated paperboard 1x is arranged in the order of the side plate 6, the bottom plate 5, the side plate 6, the top plate 4, and the adhesive piece 9 from the right side through the trunk fold line a.

Upper and outer flaps 31 are connected to the upper and lower ends of the top plate 4 via upper and outer flap folding lines b1. Each of the upper and outer flaps 31 is formed in a substantially rectangular shape.

Lower outer flaps 32 are connected to the upper and lower ends of the bottom plate 5 via lower outer flap folding lines b2. Each of the lower outer flaps 32 is formed in a substantially rectangular shape.

Inner flaps 33 are connected to the upper and lower ends of the side plates 6 via inner flap folding lines c. Each of the inner flaps 33 is formed in a substantially rectangular shape. The width of the inner flap 33 is formed to be substantially the same or about the same as the height of the upper outer flap 31 and the lower outer flap 32 (length in the vertical direction in FIG. 2).

The top plate 4 is provided with a pair of door crease lines d adjacent to its upper and lower ends. The door crease line d extends in parallel along the upper and outer flap crease line b1 so as to connect the left and right ends of the top plate 4. - 特許庁The door folding line d extends with a predetermined distance from the upper and outer flap folding line b1.

The top plate 4 is formed with a pair of door breakable lines 41 connecting both ends of the door folding line d. The door breakable line 41 extends in a convex shape in a direction away from the upper and outer flap fold line b1, and is formed in a substantially inverted "U" shape in the first embodiment. The above-described door portion 7 is configured by the door fold line d and the door breakable line 41 connecting the both ends of the door fold line d.

The door breakable line 41 is a first door breakable line 42 that connects the left and right ends of the top plate 4, and the edge of the door fold line d along the left and right ends of the top plate 4 from both ends of the first door breakable line 42. and a pair of second door breakable lines 43 extending to the part. In the first embodiment, a pair of possible door breakable lines 41 are formed, but they completely overlap at the first possible door breakable line 42 . In other words, two door breakable lines 41 are formed by sharing one first door breakable line 42 and extending a total of four second door breakable lines 43 from both ends thereof.

The possible first door breakable line 42 includes a central first door breakable line 42a extending parallel to the upper and lower ends of the top plate 4 at the center in the left-right direction, and a central first door breakable line 42a extending from the right end of the central first door breakable line 42a to the top. A right first door breakable line 42b that extends linearly downward to the right to the right end of the plate 4, and a left first door that linearly extends upward to the left from the left end of the central first door breakable line 42a to the left end of the top plate 4. and a breakable line 42c.

The top plate 4 is provided with a pair of hand hole folding lines e so as to sandwich the central first door breakable line 42a from above and below. The manual hole crease line e is formed in parallel along the central first door breakable line 42a.

The top plate 4 is provided with hand hole breakable lines 81 extending arcuately from the left and right ends of the hand hole fold line e to the central first door breakable line 42a. The break starting portion 8 described above is configured by one hand hole crease line e and a pair of hand hole breakable lines 81 extending from both ends thereof.

On the top plate 4, from the end of the possible door breakable line 41 (the end of the second possible door breakable line 43 to which the first door breakable line 42 is not connected), the corner of the adjacent top plate 4 An open breakable line 44 is provided that extends to. The open breakable line 44 is formed along the left and right ends of the top plate 4 .

Next, a procedure for assembling the packaging box 1 shown in FIG. 1 from the corrugated board 1x shown in FIG. 2 will be described.

First, an operator places the corrugated board 1x on, for example, a table (not shown), and a plurality of products (not shown) are placed on the bottom plate 5 in an aligned state.

Next, in FIG. 2, the side plate 6 arranged on the right side of the bottom plate 5 is folded along the trunk folding line a. Then, an adhesive G (see FIG. 2) is applied to the outer surface of the right side plate 6 .

Next, the left side plate 6 is erected against the bottom plate 5, the top plate 4 is made parallel to the bottom plate 5, and the adhesive piece 9 is formed by sequentially folding the bottom plate 5 along the body folding line a arranged on the left side. hanging down. Then, the inner surface of the adhesive piece 9 is fixed to the outer surface of the right side plate 6 via the adhesive G, so that the body portion 2 is assembled.

Next, the inner flap 33 is folded perpendicularly to the side plate 6 toward the inside of the body 2 along the inner flap fold line c. Then, the lower outer flap 32 is bent upward along the lower outer flap folding line b2 and stands upright from the bottom plate 5. - 特許庁As a result, the lower outer flap 32 contacts the inner flap 33 from the outside, but the two are not adhered, and the lower outer flap 32 holds the inner flap 33 in an unfixed state.

Next, an adhesive G (see FIG. 2) is applied to the outer surface of the lower outer flap 32, the upper outer flap 31 is folded downward along the upper outer flap folding line b1, and the inner surface of the upper outer flap 31 is adhered with the adhesive G. and fixed to the outer surface of the lower outer flap 32 . As a result, the open end of the trunk portion 2 is closed to form the closed portion 3 .

As described above, the assembly of the packaging box 1 containing the product is completed, and the packaging box 1 in the state shown in FIG. 1 is completed.

Next, the operation of opening the packaging box 1 of the first embodiment will be described with reference to FIGS. It should be noted that FIGS. 3 and 4 show a state in which products are omitted for easy understanding.

First, the work of opening the top plate 4 of the packaging box 1 will be described.

First, an operator inserts his or her finger into the break start portion 8 of the unopened packaging box 1 shown in FIG. As a result, the top plate 4 is broken along the central first door breakable line 42a and the manual hole breakable line 81, and is also mountain-folded at the manual hole crease line e, so that the break start portion 8 is opened.

Next, the operator puts his/her finger on the breaking start portion 8 and pulls up the door portion 7 in a direction away from each other. As a result, the top plate 4 is arranged along the door breakable line 41 (specifically, the right first door breakable line 42b, the left first door breakable line 42c, and the second door breakable line 43 in this order). ) is broken. Further, the top plate 4 is folded along the door crease line d connecting both ends of the door breakable line 41 .

As a result, the pair of door portions 7 of the top plate 4 are opened, so that a portion of the packaging box 1 (the top plate 4) is opened.

Secondly, the operation of opening the packaging box 1 up to the closing portion 3 will be described.

With the top plate 4 of the packaging box 1 opened, the operator pulls the door portion 7 closer to the front side in FIG. As a result, the remainder of the front side of the top plate 4 (the area between the door portion 7 and the fold line b1 of the upper and outer flap) is broken along the pair of open breakable lines 44 on the front side. As a result, the front half of the top plate 4 is removed from the packaging box 1.例文帳に追加

Upper and outer flaps 31 are connected to the removed top plate 4 via upper and outer flap folding lines b1, and lower and outer flaps 32 are fixed to the inner surfaces of the upper and outer flaps 31.例文帳に追加On the other hand, the lower outer flap 32 is in an unfixed state with respect to the inner flap 33 . Therefore, the top plate 4, the upper outer flap 31 and the lower outer flap 32 can be integrally rotated along the lower outer flap folding line b2. The inner flap 33 can be folded back along the inner flap folding line c by removing the lower outer flap 32 that was in contact with the outer side.

As a result, the packaging box 1 is opened up to the closing part 3 as well as the top plate 4. - 特許庁

Thirdly, the operation of unfolding the packaging box 1 for disposal will be described.

With the top plate 4 of the packaging box 1 and the closing portion 3 on the front side opened, the worker pulls the door portion 7 on the back side in FIG. 4 further to the back side. As a result, the rest of the back side of the top plate 4 (the area between the door portion 7 and the upper and outer flap folding lines b1) is broken along the pair of open breakable lines 44 on the front side. As a result, the back half of the top plate 4 is removed from the packaging box 1. - 特許庁Then, the removed top plate 4 is pivoted together with the upper outer flap 31 and the lower outer flap 32 along the lower outer flap folding line b2 in the same manner as described above.

Furthermore, the pair of side plates 6 can be folded back along the trunk folding line a by removing the top plate 4 and the lower outer flap 32 supporting them via the inner flap 33. can.

As a result, the packaging box 1 is deployed in a substantially cross shape centering on the bottom plate 5 .

Next, functions and effects of the packaging box 1 of the first embodiment will be described.

In the packaging box 1 of the first embodiment, since the second door breakable line 43 constituting the door portion 7 extends along the body folding line a, the corrugated paperboard 1x is folded along the body folding line a to form the body. It is possible to prevent the top plate 4 from being erroneously bent along the second door breakable line 43 formed at another location when making the part 2. - 特許庁

Similarly, the possible right first door breakable line 42b and the possible left first door breakable line 42c extend in parallel. , as a whole, it has a loose crank shape, and since it is not in a straight line, it is possible to prevent accidental breakage when making the body part 2. - 特許庁

In the packaging box 1 of the first embodiment, the width of the inner flap 33 and the height of the upper outer flap 31 and the lower outer flap 32 (the length in the vertical direction in FIG. 2) are formed to be substantially the same or approximately the same. Therefore, the upper outer flap 31 and the lower outer flap 32 almost completely seal the closing portion 3, making it difficult for dust and dirt to enter the interior. Further, since the top plate 4 can be supported by the lower outer flaps 32, the rigidity of the box can be increased.

According to the packaging box 1 of the first embodiment, the door portion 7 can be opened and the top plate 4 can be unsealed simply by pulling up the door portion 7 in a direction separating from each other. At this time, in the packaging box 1 of the first embodiment, the breaking start portions 8 are formed on the tip side of the door portion 7, and fingers can be inserted at the time of opening, so that the door portion 7 can be easily pulled with a finger.

In addition, since the door part 7 is formed with a folding line d along its base end, when the door part 7 is pulled up, the door part 7 is bent there, so that the top plate 4 is accidentally cut to four corners. can be prevented.

In the packaging box 1 of the first embodiment, only the top plate 4 can be opened, and if only the top plate 4 is opened, the four sides of the packaging box 1 are surrounded by the pair of side plates 6 and the pair of closing portions 3. Even if the product is likely to collapse when stacked, it is possible to prevent the product from spilling unintentionally, and the product can be displayed in this state.

Further, since the second door breakable line 43 forming the door portion 7 extends along the left and right ends of the top plate 4, the entire top plate 4 in the left and right direction can be opened. As a result, the top plate 4 can be opened widely, making it easy to take out the product.

In addition, the packaging box 1 can be resealed by taking out a part of the products from the packaging box 1, displaying them on a shelf or the like, and closing the door part 7.例文帳に追加

According to the packaging box 1 of the first embodiment, the closing portion 3 on one side can be opened by simply pulling the door portion 7 on one side. As a result, for example, when the ice cream bar is transferred to a freezer with an open top, by tilting the packaging box 1, all the products can be poured out at once. In particular, the direction of force application (pulling direction) is substantially the same when opening the top plate 4 and when opening the closed portion 3, so handling is easy.

Further, in the packaging box 1 of the first embodiment, if the other door portion 7 is also pulled, the other closed portion 3 can be opened. In the packaging box 1 of the first embodiment, since the pair of door breakable lines 41 overlap the first door breakable line 42, the top plate 4 is aligned with the door breakable line 41 and the open breakable line 44. If the top plate 4 is broken along the top plate 4, the pair of side plates 6 will not be connected. Therefore, the fully unfolded packaging box 1 is less bulky as a waste product.

Further, since the door portion 7 removed from the top plate 4 is connected to the upper and outer flaps 31 and the lower and outer flaps 32 via the adhesive G, the fully unfolded packaging box 1 is discarded. can be set to "1".

[Second embodiment]
A packaging box 20 according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code|symbol is attached|subjected to the substantially same part as 1st Embodiment, and the description is abbreviate|omitted. More specifically, the packaging box 20 according to the second embodiment differs from the first embodiment in the configuration of the crease lines and breakable lines formed on the top plate 4 and the upper and outer flaps 31. explain.

As shown in FIG. 7, an upper and outer flap fold line b1 is formed along the boundary line between the top plate 4 and the upper and outer flap 31 of the corrugated paperboard 20x. An intermediate portion of the upper outer flap fold line b1 excluding the left and right ends corresponds to the door fold line 2d of the second embodiment. That is, the door crease line 2d is formed along the upper and outer flap crease line b1 at an intermediate portion of the upper and outer flap crease line b1.

The top plate 4 is formed with a pair of door breakable lines 241 connecting both ends of the door folding line 2d. The possible door breakage line 241 consists of a first door breakable line 242 connecting the left and right ends of the top plate 4 and a pair of second doors extending along the left and right ends of the top plate 4 from both ends of the first door breakable line 242 . It has a breakable line 243a and a pair of third door breakable lines 243b extending linearly from the tip of the second door breakable line 243a to the end of the door fold line 2d while being inclined in the direction of approaching each other. The first door breakable line 242 of the second embodiment extends in parallel along the upper and lower ends of the top plate 4 .

To the upper and outer flaps 31, from the end of the possible door breakable line 241 (the end of the possible third door breakable line 243b to which the second possible door breakable line 243a is not connected), the side end of the upper and outer flap 31 A pair of open breakable lines 244 are provided that extend to. The pair of open breakable lines 244 extend linearly while being inclined in the direction of separating from each other. The third door breakable line 243b and the open breakable line 244 are connected to form a substantially right angle. Since the adhesive G should not be applied to the triangular area surrounded by the breakable line 244 and the corners of the upper and outer flaps 31, it is applied closer to the center of the upper and outer flaps 31 than the triangular area. preferably.

Next, the operation of opening the packaging box 20 of the second embodiment will be described with reference to FIGS. 8 to 10. FIG. It should be noted that FIGS. 8 and 9 show a state in which products are omitted for easy understanding.

First, the work of opening the top plate 4 of the packaging box 20 will be described.

First, an operator inserts his or her finger into the break start portion 8 of the unopened packaging box 1 shown in FIG. As a result, the top plate 4 is broken along the central portion of the first door breakable line 242 and the hand hole breakable line 81, and is mountain-folded along the hand hole fold line e, thereby opening the break start portion 8. be.

Next, the operator puts his/her finger on the breaking start portion 8 and pulls up the door portion 7 in a direction away from each other. As a result, the top plate 4 is broken along the possible door breakable line 41 in the order of the first possible door breakable line 242, the second possible door breakable line 243a, and the third possible door breakable line 243b. Further, the top plate 4 is folded back at the door crease line 2d connecting both ends of the door breakable line 41 to stand up.

As a result, the pair of door portions 7 of the top plate 4 are opened, so that the top plate 4 of the packaging box 20 is opened almost entirely. More specifically, only the triangular region surrounded by the third door breakable line 243 b and the corners of the top plate 4 remains without being cut off, and this region becomes the crosspiece 245 .

Secondly, the operation of opening the packaging box 20 up to the closing portion 3 will be described.

With the top plate 4 of the packaging box 1 unsealed, the operator pulls the front side door portion 7 in FIG. As a result, as shown in FIG. 9, the upper and outer flaps 31 on the front side connected to the door portion 7 on the front side via the upper and outer flap folding lines b1 are broken along the pair of open breakable lines 244. The top plate 4, the upper outer flap 31 and the lower outer flap 32 are integrally rotated along the lower outer flap folding line b2.

As described above, the packaging box 20 is opened up to the closed portion 3 as well as the top plate 4 .

Thirdly, the operation of unfolding the packaging box 20 for disposal is the same as that of the packaging box 1 of the first embodiment, so the explanation is omitted. The unfolded packaging box 20 is unfolded into a substantially cross shape centered on the bottom plate 5, as shown in FIG.

Next, functions and effects of the packaging box 20 of the second embodiment will be described. In addition, the description is abbreviate|omitted about the substantially same effect and effect as 1st Embodiment.

In the packaging box 20 of the second embodiment, since the intermediate portion of the upper and outer flap folding lines b1 is used as the door folding line 2d, there is no need to provide the top plate 4 with a separate door folding line. In addition, since the upper and outer flap crease lines b1 are folded at the time of box making, if the top plate 4 is broken along the door breakable line 241, the door portion 7 is folded back at the door fold line 2d. Therefore, when opening the door part 7, there is no need to make a crease along the door crease line 2d.

Moreover, in the packaging box 20 of the second embodiment, since almost the entire surface of the top plate 4 excluding the crosspieces 245 at the four corners can be opened, the product can be easily taken out. Since the crosspieces 245 at the four corners are formed, the packaging boxes 20 whose top plate 4 is opened can be vertically stacked.

[Third Embodiment]
Referring to FIG. 11, corrugated paperboard 30x is used to describe the third and fourth embodiments of the present invention. Specifically, referring to FIG. 11, the vicinity of the upper end portion of the top plate 4 will be used to describe the third embodiment, and the vicinity of the lower end portion of the top plate 4 will be used to describe the fourth embodiment. In addition, the same code|symbol is attached|subjected to the substantially same part as 1st Embodiment, and the description is abbreviate|omitted.

First, looking at the vicinity of the upper end of the top plate 4 of the corrugated paperboard 30x, the width of the upper and outer flaps 331 is designed to be smaller than the width of the top plate 4. As shown in FIG. As a result, the upper edge of the top plate 4 is formed with an open edge to which the upper outer flaps 331 are not connected at the left and right ends thereof.

The upper pair of open breakable lines 344 extend from the end of the door breakable line 41 (the end of the second door breakable line 43 to which the first door breakable line 42 is not connected). They extend obliquely in a direction toward each other on the inner side of the top plate 4 up to the edge.

Even with the packaging box of the third embodiment having such a configuration, if the top plate 4 is removed, the upper and outer flaps 31 and the lower and outer flaps 32 are rotated integrally. The same actions and effects as in 1 can be obtained.

On the other hand, looking at the vicinity of the lower end of the top plate 4 of the corrugated paperboard 30x, the width of the inner flap 433 is designed to be smaller than the width of the side plate 6. As a result, the lower edge of the side plate 6 is formed with an open edge where the inner flap 433 is not connected to the end on the top plate 4 side.

The pair of open breakable lines 444 on the lower side extend from the end of the door breakable line 41 (the end of the second door breakable line 43 to which the first door breakable line 42 is not connected) to the side plate. 6 (including adhesive strip 9 fixed to side plate 6) extends obliquely to said open edge.

Even with the packaging box of the fourth embodiment having such a configuration, if the top plate 4 is removed, the upper and outer flaps 31 and the lower and outer flaps 32 are rotated integrally. The same actions and effects as in 1 can be obtained.

That is, according to the third embodiment and the fourth embodiment of the present invention, the open breakable line 44 does not necessarily have to extend toward the corners of the top plate 4, and the upper and lower edges of the top plate 4 and the side plates 6 Of these, it is understood that the area sandwiched between the upper and outer flaps 31 and the inner flap 33, that is, the open edge where the upper and outer flaps 31 and the inner flap 33 are not provided, should be reached.

[Modification]
In the above embodiment, cardboard was used as the material, but the material may be cardboard or a thin synthetic resin plate as long as it can be folded and assembled and can be broken along the breakable line. good.

In the above-described embodiment, the trunk portion 2 has a rectangular tubular shape.

In the above-described embodiment, the trunk 2 extends in the horizontal direction to break the top plate 4. However, the packaging box of the present invention can also be used standing up so that the trunk 2 extends in the vertical direction. In this case, one of the four side plates will be broken.

In the above embodiment, the top plate 4 has a pair of door portions 7 as an example, but the number of the door portions 7 is not limited, and may be one. Moreover, the shape of the fracture starting portion 8 is not limited, and may be omitted.

In the above embodiment, one blocking portion 3 is composed of the upper and outer flaps 31 and the lower and outer flaps 32, but only one of the upper and outer flaps 31 and the lower and outer flaps 32 is provided. good too. For example, when only the upper and outer flaps 31 are provided and the lower and outer flaps 32 are omitted, for example, an insertion piece is provided at the tip of the upper and outer flaps 31 via an insertion folding line, and the bottom plate 5 and the inner flap 33, The closing part 3 can be configured by inserting it into the gap with 33 .

Even in the packaging box having this configuration, when the top plate 4 is broken by pulling the door portion 7, the insertion pieces at the tips of the top and outer flaps 31 connected to the top plate 4 are separated from the bottom plate 5 and the inner flap. 33, 33, and the door portion 7 and the upper and outer flaps 31 are removed integrally. Conversely, even when only the lower outer flap 32 is provided and the upper outer flap 31 is omitted, when the door portion 7 is removed from the top plate 4, the insertion piece at the tip of the lower outer flap 32 is released from the sandwiched state. Therefore, the closing portion 3 can be opened.

In the above-described embodiment, the upper outer flap 31 and the lower outer flap 32 are designed to have a length that overlaps each other in almost the entire height direction, but the upper outer flap 31 and the lower outer flap 32 are Since it is sufficient if it can be fixed (adhered), the tips may partially overlap each other.

In the above embodiment, the inner flaps 33 are connected to the upper and lower ends of the side plates 6 shown in FIGS. 2, 7, and 11, respectively. .

In the above embodiment, the door crease line d extends parallel to the upper and outer flap crease line b1, but the door crease line d extends at an angle to the upper and outer flap crease line b1. , or if a breakable line is added to the center of the door portion 7 in the left-right direction to divide each door portion 7 into two, the door portion 7 can be extended in a V shape.

In the above-described embodiment, a curved line 41 is described as an example, but the possible door breakable line 41 may be curved or meandering. That is, the door breakable line 41 does not need to connect the left and right ends of the top plate 4 and does not need to be formed along the left and right ends of the top plate 4 .

In the above embodiment, the pair of door breakable lines 41 completely overlap the first door breakable line 42 (242), but the pair of door breakable lines 41 are in contact at one point. Alternatively, they may be separated from each other and not in contact with each other.

In the above embodiment, the open breakable line 44 (244, 344, 444) is described as being linear, but the open breakable line 44 may be bent, curved, or meandering. Further, in the second embodiment, as the possible open breakable line 244, a line reaching the side end of the upper and outer flap 31 was explained as an example, but the possible open breakable line 244 extends outside the area where the adhesive G is applied. As long as it passes through, it may reach the upper end of the upper and outer flaps 31 .

In the above embodiment, the inner surface of the adhesive piece 9 is fixed to the outer surface of the side plate 6 via the adhesive G, but the outer surface of the adhesive piece 9 may be adhered to the inner surface of the side plate 6. Similarly, in the above embodiment, the inner surface of the upper outer flap 31 is fixed to the outer surface of the lower outer flap 32 via the adhesive G. The inner surface of the lower outer flap 32 may be adhered to the outer surface of the outer flap 31 .

In the above-described embodiment, the adhesive is used as the fixing means, but the fixing means may be a staple or an adhesive tape.

1, 20 Packaging box 2 Body part 3 Closing part 4 Top plate 5 Bottom plate 6 Side plate 31, 331 Upper and outer flaps (outer flaps)
32 lower outer flap (outer flap)
33, 433 Inner flaps 41, 241 Door breakable line 42, 242 First door breakable line 43, 243a Second door breakable line 243b Third door breakable line 44, 244, 344, 444 Open breakable line a Trunk Part crease line b1 Upper outer flap crease line (outer flap crease line)
b2 lower outer flap crease line (outer flap crease line)
c Inner flap crease line d, 2d Door crease line

Claims (6)

A packaging box having a square tube-shaped body and a closing part that closes the open end of the body,
The body is configured by connecting a top plate, a bottom plate facing the top plate, and a side plate connecting the top plate and the bottom plate via a fold line of the body,
Outer flaps are connected to the top plate and the bottom plate via outer flap crease lines at both ends of the body on the open end side,
Inner flaps are continuously provided on the side plates via inner flap fold lines at both ends of the body on the open end side,
The closing part includes the inner flap folded inward at the inner flap fold line and one outer flap connected to the top plate and the bottom plate, and is bent inward at the outer flap fold line. An outer flap that is not fixed to the inner flap in a state in which it is bent and is in contact with the inner flap from the outside, and an outer flap that is connected to the other of the top plate and the bottom plate, wherein the outer flap folds inward along the fold line of the outer flap. and an outer flap fixed to the unfixed outer flap in a state of being folded into and in contact with the unfixed outer flap from the outside,
The top plate has a door crease line extending along the outer flap crease line, a door breakable line connecting both ends of the door crease line and extending convexly in a direction away from the outer flap crease line, and the door. a breakable open line extending from the end of the breakable line to the corner of the top plate adjacent to the end of the door breakable line or the edge of the outer flap adjacent to the end of the door breakable line; A packaging box characterized in that it is provided with In the packaging box according to claim 1,
The top plate has a door crease line, the door breakable line, and the open breakable line at each of both ends on the open end side of the body, and the both door breakable lines are in contact with each other at least partially. A packaging box characterized by: In the packaging box according to claim 1 or 2,
The possible door breakable line includes a first possible door breakable line connecting the side ends of the top plate and a pair of second door breakable lines extending along the side ends of the top plate from both ends of the first possible door breakable line. A packaging box characterized by having a possible line and In the packaging box according to any one of claims 1 to 3,
A packaging box, wherein the door fold line is formed along the fold line of the outer flap at an intermediate portion in the longitudinal direction of the fold line of the outer flap. A packaging box having a square tube-shaped body and a closing part that closes the open end of the body,
The body is configured by connecting a top plate, a bottom plate facing the top plate, and a side plate connecting the top plate and the bottom plate via a fold line of the body,
On one of the top plate and the bottom plate, outer flaps are continuously provided at both ends of the body on the open end side via outer flap fold lines,
The outer flap has an insertion piece at its tip through an insertion folding line,
Inner flaps are continuously provided on the side plates via inner flap fold lines at both ends of the body on the open end side,
The closing portion includes the inner flap folded inward along the inner flap crease line and the outer flap, which is folded inward along the outer flap crease line and is in contact with the inner flap from the outside. is closed by an outer flap that is not fixed to the inner flap and the insertion piece that is provided at the tip of the outer flap and is inserted into the gap between the other of the top plate and the bottom plate and the inner flap,
The top plate has a door crease line extending along the outer flap crease line, a door breakable line connecting both ends of the door crease line and extending convexly in a direction away from the outer flap crease line, and the door. a breakable open line extending from the end of the breakable line to the corner of the top plate adjacent to the end of the door breakable line or the edge of the outer flap adjacent to the end of the door breakable line; A packaging box characterized in that it is provided with A packaging box having a square tube-shaped body and a closing part that closes the open end of the body,
The body is configured by connecting a top plate, a bottom plate facing the top plate, and a side plate connecting the top plate and the bottom plate via a fold line of the body,
The top plate and the bottom plate are provided with an outer flap connected to the end of the body on the open end side via an outer flap fold line,
An inner flap is continuously provided on the side plate via an inner flap fold line at the open end side end of the body,
The closing part includes the inner flap folded inward at the inner flap fold line and one outer flap connected to the top plate and the bottom plate, and is bent inward at the outer flap fold line. An outer flap that is not fixed to the inner flap in a state in which it is bent and is in contact with the inner flap from the outside, and an outer flap that is connected to the other of the top plate and the bottom plate, wherein the outer flap folds inward along the fold line of the outer flap. and an outer flap fixed to the unfixed outer flap in a state of being folded into and in contact with the unfixed outer flap from the outside,
The top plate is provided with a door crease line extending along the outer flap crease line and a door breakable line connecting both ends of the door crease line and extending convexly in a direction away from the outer flap crease line. be
In the top plate or the side plate, a region sandwiched between the outer flap and the inner flap at the end of the door breakable line on the open end side of the body portion of the top plate and the side plate A packaging box, characterized in that it is provided with an open breakable line extending to.

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